Electric clock.



H. ABE.

ELECTRIC CLOCK.

APPLICATION FILED MAR-6,1918.

1,325,823. Patentd Dec. 23,1919.

UNITED STATES PATENT OFFICE.

HIKOKIGHI ABE, OF YAMAGATA-KEN, JAPAN, ASSIGNOR TO JUNPEI ENDOW, 0F 7 YAMAGATA-KEN, JAPAN.

ELECTRIC CLOCK.

Application filed March 6, 1918.

To all whom it may concern:

Be it known that I, HIKOKIOHI ABE, a subject of the Emperor of Japan, residing at Yamagata-Ken, Empire of Japan, have invented certain new and useful Improvements in Electric Clocks, of which the following is a specification.

This invention relates to improvements in secondary clocks of the type electrically operable by a master clock.

The object of the invention is to provide a clock of this character which will operate accurately irrespective of the intensity of the electric current passing through the electromagnet.

The invention is best described taken with the accompanying drawings, in. which Figure l is a side elevation showing the principal part of the invention in longitudinal section.

Fig. 2 is a rear end view of the same.

Upon the back of the casing 1 containing the dial plate of the clock is fixed a suitable container 2, to which is secured a U-shaped permanent magnet 3. Interposed between both poles of the said permanent magnet 3 and arranged in juxtaposition is an electromagnet 4, one end of which is mounted with a piece of iron 5 in such a manner that when placed in position between one pole of the permanent magnet 3 and one end of the electromagnet 4 this iron piece 5 is maintained in close contact with one pole of the permanent magnet 3. 6 is an armature oscillatorily mounted between the other end of the electromagnet 4 and other pole of the permanent magnet 3.

From the armature 6 extends a rod 7 communicating with a lever 8 adapted to engage a ratchet wheel 9, so that by passing through the electromagnet an intermittent electric current and causing the consequential establishment of an attracting and repelling action, an oscillatory motion may be imparted to the lever 8, which, in turn, will cause the ratchet wheel 9 to move in the same intermittent manner.

Although, not shown in the drawing, it will be understood that the shaft upon which the said ratchet wheel 9 is mounted is connected with the second, minute and hour hands of the clock in the usual manner.

Specification of Letters Iatent.

Patented Dec. 23, 1919.

Serial No. 220,796.

In order to adjust the intensity of the electric current there is disposed adjustably in the inner side of the cover 12 of the container 2 another permanent magnet 10 in addition to the one already set forth. The position of this last named permanent magnet is such that in normal condition its two poles are located directly opposite the corresponding two poles 01"? the first named permanent magnet 3 so that when this position is changed, that is to say, when the position of the last named permanent magnet is deviated from the normal position, the magnetic flux between the magnets is varied and an adjustment of the intensity of the electric current corresponding to such deviation is thereby effected and the operation of the armature assured.

For this purpose the last named permanent magnet 10 is mounted at its center upon a suitable shaft 11 which passes through and extends beyond the outer surface of the cover 12 of the container 2 so that same may be turned by means of the wheel 13 attached to the outer end of the shaft 11.

Having thus described my invention, what I desire to claim is:

An electric clock including a base plate, a permanent U-shaped magnet having its base secured to such base plate, an electromagnet. mounted between the two arms of the U-shaped permanent magnet, an armature operated by such electromagnet, es capement mechanism connected to and controlled by such armature, and a permanent magnet movably mounted above the first named permanent and electric magnets, the poles of the second named magnet being located directly opposite to the corresponding poles of the first named permanent magnet, and means for adjusting said last named permanent magnet to vary the magnetic flux between the magnets and thereby adjust the intensity of the electric current as may be required to assure the operation of the armature.

In testimony whereof I my signature in presence of two witnesses.

HIKOKICHI ABE.

Witnesses:

H. F. OLTMANS, H. YASURUSE. 

